I can tell you about IESE and my comments on the other schools would be biased towards IESE.
ESADE is a good school, but they are more know for UG courses. IESE is a top school not only in Spain but also in Europe. Looking at the rankings, the reputation..well, IESE is top on the list among the schools that u have listed.
HEC is a fantastic school though. Again, in my opinion, it is quite french centric.
IESE - Very strong in Finance, Consulting. Many of them end up in to top IB and Consulting firms. Top industries also visit regularly. Among the three IESE, ESADE, HEC (ranked in preference).
If you need information on IESE. do let me know.
Just read your blog abuot IESE,HEC,ESADE..Would your mind sharing your email ID..Need some info on these colleges.